Back to EveryPatent.com
United States Patent | 5,751,484 |
Goodman ,   et al. | May 12, 1998 |
A method of producing mirrors comprising depositing onto a ribbon of hot glass during the production process a coating comprising at least one pyrolytic reflecting layer and at least one color modifying layer whereby the mirrors exhibit color in reflectance and have a visible light reflection of at least 35% and less than 70%. There is also a provided a mirror having such a coating.
Inventors: | Goodman; Ronald D. (Toledo, OH); Soubeyrand; Michel J. (Holland, OH); Jenkinson; Timothy (Wigan, GB2) |
Assignee: | Libbey-Owens-Ford Co. (Toeldo, OH); Pilkington PLC (GB2) |
Appl. No.: | 758692 |
Filed: | December 3, 1996 |
Current U.S. Class: | 359/512; 359/507; 359/589; 428/216 |
Intern'l Class: | G02B 005/08; B32B 017/06 |
Field of Search: | 359/507,509,512,838,870,883,884,894,580-590 65/60.2,60.5,60.8,95,97 427/165-167,419.2,419.3,419.4,255,255.3 |
4634242 | Jan., 1987 | Taguchi et al. | 359/512. |
5217753 | Jun., 1993 | Goodman et al. | 65/60. |
5525406 | Jun., 1996 | Goodman et al. | 359/589. |
5576885 | Nov., 1996 | Lowe et al. | 359/512. |
TABLE 1 __________________________________________________________________________ Upstream Beam Intermediate Beam Downstream Beam Glass Thickness Glass Speed Temp. Gas Flows Temp. Gas Flows Temp. Gas Flows mm m/hour .degree.C. liters/min .degree.C. liters/min .degree.C. liters/min __________________________________________________________________________ Example 1 2.3 820 710 SiH.sub.4 :2.9 680 SiH.sub.4 :1.7 600 DMT:10.3 lbs/hr N.sub.2 :26 C.sub.2 H.sub.4 :17 H.sub.2 O:13.2 lbs/hr He:115 O.sub.2: 3.6 O.sub.2 :200 N.sub.2 :63 He:300 He:57 Example 2 1.2 320 680 SiH.sub.4 :0.3 630 SiH.sub.4 :2.8 620 SiH.sub.4 :1.1 N.sub.2 :40 C.sub.2 H.sub.4 :0.4 C.sub.2 H.sub.4 :0.2 N.sub.2 :25 N.sub.2 :20 *CH.sub.3 COCH.sub.3 :9.4 Example 3 2.3 820 710 SiH.sub.4 :4.6 680 SiH.sub.4 :1.1 600 DMT:10.3 lbs/hr N.sub.2 :26 C.sub.2 H.sub.4 :17 H.sub.2 O:13.2 lbs/hr He:115 O.sub.2 :3.6 O.sub.2 :200 N.sub.2 :63 He:300 He:57 Example 4 3.2 820 710 SiH.sub.4 :10 680 SiH.sub.4 :6.5 600 DMT:35 lbs/hr N.sub.2 :450 C.sub.2 H.sub.4 :38 H.sub.2 O:20 lbs/hr O.sub.2 :25 N.sub.2 :120 N.sub.2 :530 O.sub.2 :240 HF:5 __________________________________________________________________________ *mls/min
TABLE 2 __________________________________________________________________________ Inner Layer Intermediate Layer Outer Layer Thickness Ref Thickness Ref Thickness Ref Reflection a* b* nm Index nm Index nm Index __________________________________________________________________________ Example 1 47% -24.2 -21.3 20 4.8 30 1.45 80 1.90 Example 2 47% -21.5 -16.8 N/A 4.8 N/A 1.46 N/A 4.6 Example 3 48% -17 -15 27 4.8 21 1.45 80 1.90 Example 4 38% -3.7 -13.7 40 4.8 41.5 1.45 200 1.80 __________________________________________________________________________